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-rw-r--r--lib/libelf/libelf_memory.c96
1 files changed, 96 insertions, 0 deletions
diff --git a/lib/libelf/libelf_memory.c b/lib/libelf/libelf_memory.c
new file mode 100644
index 00000000000..550211b689f
--- /dev/null
+++ b/lib/libelf/libelf_memory.c
@@ -0,0 +1,96 @@
+/*-
+ * Copyright (c) 2011 Joseph Koshy
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <ar.h>
+#include <assert.h>
+#include <string.h>
+#include <libelf.h>
+
+#include "_libelf.h"
+
+ELFTC_VCSID("$Id: libelf_memory.c,v 1.1 2019/02/01 05:27:38 jsg Exp $");
+
+/*
+ * Create an ELF descriptor for a memory image, optionally reporting
+ * parse errors.
+ */
+
+Elf *
+_libelf_memory(unsigned char *image, size_t sz, int reporterror)
+{
+ Elf *e;
+ int e_class;
+ enum Elf_Error error;
+ unsigned int e_byteorder, e_version;
+
+ assert(image != NULL);
+ assert(sz > 0);
+
+ if ((e = _libelf_allocate_elf()) == NULL)
+ return (NULL);
+
+ e->e_cmd = ELF_C_READ;
+ e->e_rawfile = image;
+ e->e_rawsize = sz;
+
+#undef LIBELF_IS_ELF
+#define LIBELF_IS_ELF(P) ((P)[EI_MAG0] == ELFMAG0 && \
+ (P)[EI_MAG1] == ELFMAG1 && (P)[EI_MAG2] == ELFMAG2 && \
+ (P)[EI_MAG3] == ELFMAG3)
+
+ if (sz > EI_NIDENT && LIBELF_IS_ELF(image)) {
+ e_byteorder = image[EI_DATA];
+ e_class = image[EI_CLASS];
+ e_version = image[EI_VERSION];
+
+ error = ELF_E_NONE;
+
+ if (e_version > EV_CURRENT)
+ error = ELF_E_VERSION;
+ else if ((e_byteorder != ELFDATA2LSB && e_byteorder !=
+ ELFDATA2MSB) || (e_class != ELFCLASS32 && e_class !=
+ ELFCLASS64))
+ error = ELF_E_HEADER;
+
+ if (error != ELF_E_NONE) {
+ if (reporterror) {
+ LIBELF_PRIVATE(error) = LIBELF_ERROR(error, 0);
+ (void) _libelf_release_elf(e);
+ return (NULL);
+ }
+ } else {
+ _libelf_init_elf(e, ELF_K_ELF);
+
+ e->e_byteorder = e_byteorder;
+ e->e_class = e_class;
+ e->e_version = e_version;
+ }
+ } else if (sz >= SARMAG &&
+ strncmp((const char *) image, ARMAG, (size_t) SARMAG) == 0)
+ return (_libelf_ar_open(e, reporterror));
+
+ return (e);
+}